3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = 1; $b = 2; $c = 3; echo $a ?: $b : $c; $a = null; echo $a ?: $b : $c; $b = null; echo $a ?: $b : $c;
Output for 5.3.0 - 5.3.22, 5.4.0 - 5.4.12
Parse error: syntax error, unexpected ':', expecting ',' or ';' in FORT0 on line 7
Process exited with code 255.
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173.65 ms | 1395 KiB | 43 Q